490 lines
17 KiB
Python
Executable file
490 lines
17 KiB
Python
Executable file
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# 2010-2011 Nico Schottelius (nico-cdist at schottelius.org)
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#
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# This file is part of cdist.
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#
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# cdist is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# cdist is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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import argparse
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import logging
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import os
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import subprocess
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import shutil
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import sys
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import tempfile
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BANNER = """
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.. . .x+=:. s
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dF @88> z` ^% :8
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'88bu. %8P . <k .88
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. '*88888bu . .@8Ned8" :888ooo
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.udR88N ^"*8888N .@88u .@^%8888" -*8888888
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<888'888k beWE "888L ''888E` x88: `)8b. 8888
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9888 'Y" 888E 888E 888E 8888N=*8888 8888
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9888 888E 888E 888E %8" R88 8888
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9888 888E 888F 888E @8Wou 9% .8888Lu=
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?8888u../ .888N..888 888& .888888P` ^%888*
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"8888P' `"888*"" R888" ` ^"F 'Y"
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"P' "" ""
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"""
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# Given paths from installation
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BASE_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
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CONF_DIR = os.path.join(BASE_DIR, "conf")
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GLOBAL_EXPLORER_DIR = os.path.join(CONF_DIR, "explorer")
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LIB_DIR = os.path.join(BASE_DIR, "lib")
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MANIFEST_DIR = os.path.join(CONF_DIR, "manifest")
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TYPE_DIR = os.path.join(CONF_DIR, "type")
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REMOTE_BASE_DIR = "/var/lib/cdist"
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REMOTE_CONF_DIR = os.path.join(REMOTE_BASE_DIR, "conf")
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REMOTE_OBJECT_DIR = os.path.join(REMOTE_BASE_DIR, "object")
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REMOTE_TYPE_DIR = os.path.join(REMOTE_CONF_DIR, "type")
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REMOTE_GLOBAL_EXPLORER_DIR = os.path.join(REMOTE_CONF_DIR, "explorer")
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DOT_CDIST = ".cdist"
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VERSION = "2.0.0"
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#class Context(object):
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#
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# def __init__(self, target_host):
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# self.target_host = target_host
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#
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# # class variable
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# user_selber_shuld_wenn_aendert = 'bla'
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#
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# # read only, aber statisch
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# @property
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# def remote_base_directory(self):
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# return "/var/lib/cdist"
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# @property.setter
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#
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# @property
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# def special_foo(self):
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# return 'foo/{0}'.format(self.target_host)
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#
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logging.basicConfig(level=logging.DEBUG, format='%(levelname)s: %(message)s')
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log = logging.getLogger()
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# List types
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def list_types():
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return os.listdir(TYPE_DIR)
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def banner():
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"""Guess what :-)"""
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print(BANNER)
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class Cdist:
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"""Cdist main class to hold arbitrary data"""
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def __init__(self, target_host, initial_manifest=False):
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self.target_host = target_host
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self.remote_prefix = ["ssh", "root@" + self.target_host]
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# Setup directory paths
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self.temp_dir = tempfile.mkdtemp()
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self.out_dir = os.path.join(self.temp_dir, "out")
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os.mkdir(self.out_dir)
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self.global_explorer_out_dir = os.path.join(self.out_dir, "explorer")
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os.mkdir(self.global_explorer_out_dir)
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self.object_base_dir = os.path.join(self.out_dir, "object")
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# Setup binary directory + contents
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self.bin_dir = os.path.join(self.out_dir, "bin")
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os.mkdir(self.bin_dir)
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self.link_type_to_emulator()
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# List of type explorers transferred
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self.type_explorers_transferred = {}
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# Mostly static, but can be overwritten on user demand
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if initial_manifest:
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self.initial_manifest = initial_manifest
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else:
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self.initial_manifest = os.path.join(MANIFEST_DIR, "init")
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def cleanup(self):
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# Do not use in __del__:
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# http://docs.python.org/reference/datamodel.html#customization
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# "other globals referenced by the __del__() method may already have been deleted
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# or in the process of being torn down (e.g. the import machinery shutting down)"
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#
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print("I should cleanup " + self.temp_dir)
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# shutil.rmtree(self.temp_dir)
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def exit_error(self, *args):
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log.error(*args)
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sys.exit(1)
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def remote_mkdir(self, directory):
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"""Create directory on remote side"""
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self.run_or_fail(["mkdir", "-p", directory], remote=True)
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def remote_cat(filename):
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"""Use cat on the remote side for output"""
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self.run_or_fail(["cat", filename], remote=True)
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def shell_run_or_debug_fail(self, script, *args, **kargs):
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# Manually execute /bin/sh, because sh -e does what we want
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# and sh -c -e does not exit if /bin/false called
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args[0][:0] = [ "/bin/sh", "-e" ]
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if "remote" in kargs:
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if kargs["remote"]:
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args[0][:0] = self.remote_prefix
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remote = true
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del kargs["remote"]
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log.debug("Shell exec: " + " ".join(*args))
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try:
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subprocess.check_call(*args, **kargs)
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except subprocess.CalledProcessError:
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log.error("Code that raised the error:\n")
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if remote:
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remote_cat(script)
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else:
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script_fd = open(script)
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print(script_fd.read())
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script_fd.close()
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self.exit_error("Non-Zero exit code exit of " + " ".join(*args))
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def run_or_fail(self, *args, **kargs):
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if "remote" in kargs:
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if kargs["remote"]:
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args[0][:0] = self.remote_prefix
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del kargs["remote"]
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log.debug("Exec: " + " ".join(*args))
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try:
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subprocess.check_call(*args, **kargs)
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except subprocess.CalledProcessError:
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self.exit_error("Command failed: " + " ".join(*args))
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def remove_remote_dir(self, destination):
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self.run_or_fail(["rm", "-rf", destination], remote=True)
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def transfer_dir(self, source, destination):
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"""Transfer directory and previously delete the remote destination"""
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self.remove_remote_dir(destination)
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self.run_or_fail(["scp", "-qr", source, "root@" + self.target_host + ":" + destination])
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def global_explorer_output_path(self, explorer):
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"""Returns path of the output for a global explorer"""
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return os.path.join(self.global_explorer_out_dir, explorer)
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def type_explorer_output_dir(self, cdist_object):
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"""Returns and creates dir of the output for a type explorer"""
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dir = os.path.join(self.object_dir(cdist_object), "explorer")
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if not os.path.isdir(dir):
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os.mkdir(dir)
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return dir
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def remote_global_explorer_path(self, explorer):
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"""Returns path to the remote explorer"""
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return os.path.join(REMOTE_GLOBAL_EXPLORER_DIR, explorer)
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def list_global_explorers(self):
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"""Return list of available explorers"""
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return os.listdir(GLOBAL_EXPLORER_DIR)
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def list_type_explorers(self, type):
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"""Return list of available explorers for a specific type"""
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dir = self.type_explorer_dir(type)
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if os.path.isdir(dir):
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list = os.listdir(dir)
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else:
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list = []
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return list
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def list_object_paths(self, starting_point = False):
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"""Return list of paths of existing objects"""
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object_paths = []
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if not starting_point:
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starting_point = self.object_base_dir
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for content in os.listdir(starting_point):
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full_path = os.path.join(starting_point, content)
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if os.path.isdir(full_path):
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object_paths.extend(self.list_object_paths(starting_point = full_path))
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# Directory contains .cdist -> is an object
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if content == DOT_CDIST:
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object_paths.append(starting_point)
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return object_paths
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def get_type_from_object(self, cdist_object):
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"""Returns the first part (i.e. type) of an object"""
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return cdist_object.split(os.sep)[0]
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def get_object_id_from_object(self, cdist_object):
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"""Returns everything but the first part (i.e. object_id) of an object"""
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return os.sep.join(cdist_object.split(os.sep)[1:])
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def object_dir(self, cdist_object):
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"""Returns the full path to the object (including .cdist)"""
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return os.path.join(self.object_base_dir, cdist_object, DOT_CDIST)
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def remote_object_dir(self, cdist_object):
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"""Returns the remote full path to the object (including .cdist)"""
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return os.path.join(REMOTE_OBJECT_DIR, cdist_object, DOT_CDIST)
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def object_parameter_dir(self, cdist_object):
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"""Returns the dir to the object parameter"""
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return os.path.join(self.object_dir(cdist_object), "parameter")
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def remote_object_parameter_dir(self, cdist_object):
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"""Returns the remote dir to the object parameter"""
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return os.path.join(self.remote_object_dir(cdist_object), "parameter")
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def list_objects(self, starting_point = False):
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"""Return list of existing objects"""
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if not starting_point:
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starting_point = self.object_base_dir
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object_paths = self.list_object_paths(starting_point)
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objects = []
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log.debug("Paths recieved: %s", object_paths)
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for path in object_paths:
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objects.append(os.path.relpath(path, starting_point))
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return objects
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def type_explorer_dir(self, type):
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"""Return directory that holds the explorers of a type"""
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return os.path.join(TYPE_DIR, type, "explorer")
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def type_manifest_path(self, type):
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"""Return path to manifest of type"""
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return os.path.join(TYPE_DIR, type, "manifest")
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def remote_type_explorer_dir(self, type):
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"""Return remote directory that holds the explorers of a type"""
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return os.path.join(REMOTE_TYPE_DIR, type, "explorer")
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def transfer_object_parameter(self, cdist_object):
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"""Transfer the object parameter to the remote destination"""
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# Create base path before using mkdir -p
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self.remote_mkdir(self.remote_object_parameter_dir(cdist_object))
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# Synchronise parameter dir afterwards
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self.transfer_dir(self.object_parameter_dir(cdist_object),
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self.remote_object_parameter_dir(cdist_object))
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def transfer_global_explorers(self):
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"""Transfer the global explorers"""
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self.transfer_dir(GLOBAL_EXPLORER_DIR, REMOTE_GLOBAL_EXPLORER_DIR)
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def transfer_type_explorers(self, type):
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"""Transfer explorers of a type, but only once"""
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if type in self.type_explorers_transferred:
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log.debug("Skipping retransfer for %s", type)
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return
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else:
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# Do not retransfer
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self.type_explorers_transferred[type] = 1
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src = self.type_explorer_dir(type)
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remote_base = os.path.join(REMOTE_TYPE_DIR, type)
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dst = self.remote_type_explorer_dir(type)
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# Only continue, if there is at least the directory
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if os.path.isdir(src):
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# Ensure that the path exists
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self.remote_mkdir(remote_base)
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self.transfer_dir(src, dst)
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def link_type_to_emulator(self):
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"""Link type names to cdist-type-emulator"""
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for type in list_types():
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source = os.path.join(LIB_DIR, "cdist-type-emulator")
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destination = os.path.join(self.bin_dir, type)
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log.debug("Linking %s to %s", source, destination)
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os.symlink(source, destination)
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def run_global_explores(self):
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"""Run global explorers"""
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explorers = self.list_global_explorers()
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if(len(explorers) == 0):
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self.exit_error("No explorers found in", GLOBAL_EXPLORER_DIR)
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self.transfer_global_explorers()
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for explorer in explorers:
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output = self.global_explorer_output_path(explorer)
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output_fd = open(output, mode='w')
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cmd = []
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cmd.append("__explorer=" + REMOTE_GLOBAL_EXPLORER_DIR)
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cmd.append(self.remote_global_explorer_path(explorer))
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self.run_or_fail(cmd, stdout=output_fd, remote=True)
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output_fd.close()
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def run_type_explorer(self, cdist_object):
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"""Run type specific explorers for objects"""
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# Based on bin/cdist-object-explorer-run
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# Transfering explorers for this type
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type = self.get_type_from_object(cdist_object)
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self.transfer_type_explorers(type)
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cmd = []
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# FIXME: __global::__object_id::__self::
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cmd.append("__explorer=" + REMOTE_GLOBAL_EXPLORER_DIR)
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cmd.append("__type_explorer=" + self.remote_type_explorer_dir(type))
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# Need to transfer at least the parameters for objects to be useful
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self.transfer_object_parameter(cdist_object)
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cmd.append("__object=" + self.remote_object_dir(cdist_object))
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explorers = self.list_type_explorers(type)
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for explorer in explorers:
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remote_cmd = cmd + [os.path.join(self.remote_type_explorer_dir(type), explorer)]
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output = os.path.join(self.type_explorer_output_dir(cdist_object), explorer)
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output_fd = open(output, mode='w')
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self.run_or_fail(remote_cmd, stdout=output_fd, remote=True)
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output_fd.close()
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def init_deploy(self):
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log.info("Creating clean directory structure")
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# Ensure there is no old stuff, neither local nor remote
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# remote_run_or_fail(hostname, ["rm -rf", "${__cdist_remote_base_dir}"])
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#
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# # Create base directories
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# remote_run_or_fail(hostname,["mkdir -p", "${__cdist_remote_base_dir}"])
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#
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# # Link configuraion source directory - consistent with remote
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# run_or_fail(["ln -sf", "$__cdist_conf_dir", "$__cdist_local_base_dir/$__cdist_name_conf_dir"])
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def run_initial_manifest(self):
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"""Run the initial manifest"""
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# FIXME: add support for __manifest::
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env = { "__manifest" : MANIFEST_DIR }
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self.run_manifest(self.initial_manifest, extra_env=env)
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def run_type_manifest(self, cdist_object):
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"""Run manifest for a specific object"""
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type = self.get_type_from_object(cdist_object)
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manifest = self.type_manifest_path(type)
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# FIXME: add more sensible checks for manifest
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if os.path.exists(manifest):
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env = { "__object" : self.object_dir(cdist_object),
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"__object_id": self.get_object_id_from_object(cdist_object),
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"__object_fq": cdist_object,
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"__type": type
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}
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self.run_manifest(manifest, extra_env=env)
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def run_manifest(self, manifest, extra_env=None):
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"""Run a manifest"""
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log.info("Running manifest %s, env=%s", manifest, extra_env)
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env = os.environ.copy()
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env['PATH'] = self.bin_dir + ":" + env['PATH']
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env['__target_host'] = self.target_host
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env['__global'] = self.out_dir
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# Legacy stuff to make cdist-type-emulator work
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env['__cdist_conf_dir'] = CONF_DIR
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env['__cdist_core_dir'] = os.path.join(BASE_DIR, "core")
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env['__cdist_local_base_dir'] = self.temp_dir
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env['__cdist_manifest'] = self.initial_manifest
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# Other environment stuff
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if extra_env:
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env.update(extra_env)
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self.shell_run_or_debug_fail(manifest, [manifest], env=env)
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def deploy_to(self):
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"""Mimic the old deploy to: Deploy to one host"""
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log.info("Deploying to host " + self.target_host)
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self.init_deploy()
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self.run_global_explores()
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self.run_initial_manifest()
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old_objects = []
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objects = self.list_objects()
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# Continue process until no new objects are created anymore
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while old_objects != objects:
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log.debug("Prepare stage")
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old_objects = list(objects)
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# FIXME: do not rerun existing objects!
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for cdist_object in objects:
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self.run_type_explorer(cdist_object)
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self.run_type_manifest(cdist_object)
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objects = self.list_objects()
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description='cdist ' + VERSION)
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parser.add_argument('host', nargs='*', help='one or more hosts to operate on')
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parser.add_argument('-b', '--banner',
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help='Show cdist banner',
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action='store_true', dest='banner')
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parser.add_argument('-d', '--debug', help='Set log level to debug',
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action='store_true')
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parser.add_argument('-i', '--initial-manifest',
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help='Path to a cdist manifest or - to read from stdin',
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dest='manifest', required=False)
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parser.add_argument('-p', '--parallel',
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help='Operate on multiple hosts in parallel',
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action='store_true', dest='parallel')
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parser.add_argument('-s', '--sequential',
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help='Operate on multiple hosts sequentially',
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action='store_false', dest='parallel')
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args = parser.parse_args(sys.argv[1:])
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if args.debug:
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logging.root.setLevel(logging.DEBUG)
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if args.banner:
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|
banner()
|
|
sys.exit(0)
|
|
|
|
try:
|
|
log.debug(args)
|
|
|
|
for host in args.host:
|
|
c = Cdist(host, initial_manifest=args.manifest)
|
|
c.deploy_to()
|
|
c.cleanup()
|
|
except KeyboardInterrupt:
|
|
sys.exit(0)
|